Ogallala Water

Dr. Schlegel’s current research is focused on:

1. limited irrigated cropping systems to reduce groundwater depletion while maintaining profitability and
2. dryland cropping systems that reduce tillage, increase capture of precipitation, reduce evaporation and erosion potential while enhancing crop yields.

On his participation with the Ogallala Water Coordinated Agriculture Project, Dr. Schlegel says: "OWCAP's research and collaboration with other team members will improve products disseminated to producers, supporting them in improving management decisions related to water utilization."

Links

Southwest Research Center – Tribune

Selected Publications

Schlegel, A.J., Y. Assefa, L.A. Haag, C.R. Thompson, J.D. Holman, and L.R. Stone. 2016. Yield and soil water in three dryland wheat and grain sorghum rotations. Agron. J. (in press)

Schlegel, A.J., Y. Assefa, T.J.Dumler, L.A. Haag, L.R. Stone, A.D. Halvorson, and C.R. Thompson. 2016. Limited irrigation of corn-based no-till crop rotations in west central Great Plains. Agron. J. 108:1132-1141.

Schlegel, A.J., Y. Assefa, D. O’Brien, F.R. Lamm, L.A. Haag, and L.R. Stone. 2016. Comparison of corn, grain sorghum, soybean, and sunflower under limited irrigation. Agron. J. 108:670-679.

Boyer, J.S., P. Byrne, K.G. Cassman, M. Cooper, D. Delmer, T. Greene, F. Gruis, J. Habben, N. Hausmann, N. Kenny, R. Lafitte, S. Paszkiewicz, D. Porter, A. Schlegel, J. Schussler, T. Setter,
J. Shanahan, R.E. Sharp, T.J. Vyn, D. Warner, and J. Gaffney. 2013. The U.S. drought of 2012 in perspective: A call to action. Global Food Security 2:139-143.

Blanco-Canqui, H. J.D. Holman, A.J. Schlegel, J. Tatarko, and T.M. Shaver. 2013. Replacing fallow with cover crops in a semiarid soil: Effects on soil properties. Soil Sci. Soc. Am. J. 77:1026-1034

Frank, B.J., A.J. Schlegel, L. R. Stone, and M.B. Kirkham. 2013. Association of grain yield with identifiable plant characteristics of corn hybrids in the west-central Great Plains. Agron J. 105:383-394.

Liu, L., N. Klocke, S. Yan, D. Rogers, A. Schlegel, F. Lamm, S.I. Chang, and D. Wang. 2013. Impact of deficit irrigation on maize physical and chemical properties and ethanol yield. Cereal Chemistry 90:453-462.

Van Pelt, R.S., M.C. Baddock, T.M. Zobeck, A.J. Schlegel, M.F. Vigil, and V. Acosta-Martinez. 2013. Field wind tunnel testing of two silt loam soils on the North American Central High Plains. Aeolian Research 10:53-59.

Schlegel, A.J., L.R. Stone, T.J. Dumler, and F.R. Lamm. 2012. Managing diminished irrigation capacity with preseason irrigation and plant density for corn production. Trans. ASABE 55(2):525-531.

Halvorson, A.D. and A.J. Schlegel. 2012. Crop rotation effect on soil carbon and nitrogenstocks under limited irrigation. Agron J. 104:1265-1273.

Blanco-Canqui, H., A.J. Schlegel, and W.F. Heer. 2011. Soil-profile distribution of carbon and associated properties in no-till along a precipitation gradient in the central Great Plains. Agric. Ecosystems Environment 144:107-116.

Stone, L.R., N.L. Klocke, A.J. Schlegel, F.R. Lamm, and D.J. Tomsicek. 2011. Equations for drainage component of the field water balance. Applied Engr. Agric. 27:345-350.

Blanco-Canqui, H., N.L. Klocke, A.J. Schlegel, L.R. Stone, and C.W. Rice. 2010. Impacts of deficit irrigation on carbon sequestration and soil physical properties under no-till. Soil Science Soc. Amer. J. 74:1301-1309.

Blanco-Canqui, H., L.R. Stone, A.J. Schlegel, J.G. Benjamin, M.F. Vigil, and P.W. Stahlman. 2010. Continuous cropping systems reduce near-surface maximum compaction in no-till soils. Agron. J. 102:1217-1225.

Stone, L.R. and A.J. Schlegel. 2010. Tillage and crop rotation phase effects on soil physical properties in the west-central Great Plains. Agron. J. 102:483-491.

Williams, J.R., R.V. Llewelyn, D.L. Pendell, A.J. Schlegel, T.J. Dumler. 2010. A risk analysis of converting Conservation Reserve Program acres to a wheat-sorghum-fallow rotation. Agron. J. 102:612-622.

Blanco-Canqui, H., M.M. Mikha, J.G. Benjamin, L.R. Stone, A.J. Schlegel, D.J. Lyon, M.F. Vigil, and P.W. Stahlman. 2009. Regional study of no-till impacts on near-surface aggregate properties that influence soil erodibility. Soil Sci. Soc. Amer. J. 73:1-8.

Blanco-Canqui, H., L.R. Stone, A.J. Schlegel, D.J. Lyon, M.F. Vigil, M.M. Mikha, P.W. Stahlman, and C.W. Rice. 2009. No-till induced increase in organic carbon reduces maximum bulk density of soils. Soil Sci. Soc. Amer. J. 73:1871-1879.

Burton, R.O., R.P. Smith, and A.J. Schlegel. 2009. Economics of reduced-till, no-till and opportunity cropping in western Kansas. J. American Society Farm Managers Rural Appraisers. 72:164-176.

Stone, L.R., F.R. Lamm, A.J. Schlegel, and N.L. Klocke. 2008. Storage efficiency of off-season irrigation. Agron. J. 100:1-8.

Stone, L.R. and A.J. Schlegel. 2006. Yield-water supply relationships of grain sorghum and winter wheat. Agron. J. 98:1359-1366.

Stone, L.R., A.J. Schlegel, A.H. Khan, N.L. Klocke, and R.M. Aiken. 2006. Water supply:yield relationships developed for study of water management. J. Nat. Resour. Life Sci. Educ. 35:161-173.

Bandura, V., B.A. Stewart, L. Baumhardt, S. Ambati, C.A. Robinson, and A.J. Schlegel. 2006. Growing dryland grain sorghum in clumps to reduce vegetative growth and increase yield. Agron. J. 98:1109-1120.

Stone, L.R., D.E. Goodrum, A.J. Schlegel, M.N. Jaafar, and A.H. Khan. 2002. Water depletion depth of grain sorghum and sunflower in the central High Plains. Agron. J. 94:936-943.

Schlegel, A.J., T.J. Dumler, and C.R. Thompson. 2002. Feasibility of four-year crop rotations in the central Great Plains. Agron J. 94:509-517.

Schlegel, A.J., K.C. Dhuyvetter, C.R. Thompson, and J.L. Havlin. 1999. Agronomic and economic impacts of tillage and rotation on wheat and sorghum. J. Prod. Agric. 12:629-636

Schlegel, A.J. and J.L. Havlin. 1997. Green fallow for the central Great Plains. Agron. J. 89:762-767.

Khan, A.H., L.R. Stone, O.H. Buller, A.J. Schlegel, M.C. Knapp, J.I. Perng, H.L. Manges, and D.H. Rogers. 1996. Educational software for illustration of drainage, evapotranspiration, and crop yield. J. Nat. Resour. Life Sci. Educ. 25:170-174.

Peterson, G.A., A.J. Schlegel, D.L. Tanaka, and O.R. Jones. 1996. Precipitation-use efficiency as affected by cropping and tillage systems. J. Prod. Agric. 9:180-186.

Stone, L.R., A.J. Schlegel, R.E. Gwin, Jr., and A.H. Khan. 1996. Response of corn, grain sorghum, and sunflower to irrigation in the High Plains of Kansas. Agric. Water Mgmt. 30:251-259.

Stone, L.R., A.J. Schlegel, F.R. Lamm, and W.E. Spurgeon. 1994. Storage efficiency of preplant irrigation. J. Soil Water Cons. 49:338-343.

Norwood, C.A., A.J. Schlegel, D.W. Morishita, and R.E. Gwin. 1990. Cropping system and tillage effects on available soil water and yield of grain sorghum and winter wheat. J. Prod. Agric. 3:356-362.

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